I am 65 and have been wearing hearing aids for ten years. My hearing loss is equally severe in both ears. It did begin with hearing loss at the high tones but has progressed to a difficulty in distinquishing words vs. hearing a noise. The tough part is the amount of concentration it takes when attempting to listen to others. I basically have to cease any other activity and devote my total attention to listening.
I believe my hearing loss occured from numerous explosions and weapons fire and not just my own shooting. It is also the shared opinion of three audioligist I have used over the years.
Hearing technology is helpful, but it can only do so much. I will say it does help with tennitus.